Malicious PDF — malware analysis report

Static analysis result for SHA-256 9623410b159d9cc5…

MALICIOUS

PDF

55.5 KB Created: 2020-08-11 05:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfe49c829df83db3166f0a8f12ea72c4 SHA-1: 42d4ec225d30e7382e5b9995f6b6784d48c822e2 SHA-256: 9623410b159d9cc5f658fa4543d30ea98a20520c5aeaf8e5afa94db73445cf5d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sensory+evaluation+of+food+pdf+download'. This URL is presented within the document body as a lure for a PDF download. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors indicates a phishing attempt designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=sensory+evaluation+of+food+pdf+download In PDF document text
    • http://files.oslutheran.com/uploads/1/3/1/4/131483249/dulifeduzasuzafufa.pdfIn PDF document text
    • http://files.bhutaniowa.org/uploads/1/3/0/7/130776795/janokakag-fizoregojave.pdfIn PDF document text
    • http://files.heroinetheplay.com/uploads/1/3/2/3/132302868/58ef0b9933a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/indesign_smaller_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/23395905578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/rovatak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/dunake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/the_age_of_sustainable_development_jeffrey_sachs_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/33841779443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/aaai_isma_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/69393109448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/index_page_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/11660390056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/visatutasijunokuzos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000992c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 5392 bytes
SHA-256: f374d29481df11652f0eaa8e5ae7cadeac023541cae5284cb482c92618ac75e1
font_01_sfnt_off0000aba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA8 11208 bytes
SHA-256: c492c30214415fcf01bce408c78733ab508973091d80604e6e9739cee57c5c63

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